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Low-melting-point high-flowability ternary random copolymer polyamide modified base material resin and preparation method thereof

A random copolymerization and base resin technology, which is applied in the field of ternary random copolymer polyamide modified base resin and its preparation, can solve the problems of decomposition, deterioration, and inability to add, so as to improve fluidity and reduce regularity , the effect of less decomposition

Active Publication Date: 2020-03-13
HUAFON GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This causes a large amount of additives to decompose, deteriorate or even fail to add during processing. In order to improve the processing conditions of polyhexamethylene adipamide, it is necessary to lower the melting point of polyhexamethylene adipamide

Method used

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  • Low-melting-point high-flowability ternary random copolymer polyamide modified base material resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 37.7kg (324mol) of hexamethylenediamine and 47.3kg (324mol) of adipic acid were mixed and reacted in desalted water at 60°C to form a salt, and a small amount of hexamethylenediamine was added to adjust the pH, so that the weight concentration was 53%, and the pH was 7.8. Polyamide salt solution;

[0033] 4.4kg (38mol) of 2-methylpentamethylenediamine and 5.6kg (38mol) of adipic acid were mixed and reacted in desalted water at 60°C to form a salt, and a small amount of hexamethylenediamine was added to adjust the pH to obtain a weight concentration of 53%, A polyamide salt solution with a pH of 7.8;

[0034] 5 kg (44 mol) of caprolactam was dissolved in desalted water at 60°C to obtain a caprolactam solution with a weight concentration of 50%. Mix the three solutions evenly, pour them into a concentration tank, and under the protection of nitrogen at an absolute pressure of 0.2MPa (absolute pressure), slowly heat and evaporate to concentrate until the concentration of ...

Embodiment 2

[0039] 34.6kg (298mol) of hexamethylenediamine and 43.4kg (298mol) of adipic acid were mixed and reacted in desalted water at 65°C to form a salt, and a small amount of hexamethylenediamine was added to adjust the pH, so that the weight concentration was 60%, and the pH was 7.5. Polyamide salt solution;

[0040] Mix 6.6 kg (57.5 mol) of 2-methylpentamethylenediamine and 8.4 kg (57.5 mol) of adipic acid in desalted water at 65°C to form a salt, and add a small amount of hexamethylenediamine to adjust the pH to obtain a weight concentration of 60 %, pH is the polyamide salt solution of 7.5;

[0041] 7 kg (62 mol) of caprolactam was dissolved in desalted water at 65°C to obtain a caprolactam solution with a weight concentration of 60%.

[0042]Mix the three solutions evenly, pour them into a concentration tank, and under the protection of nitrogen at an absolute pressure of 0.25MPa (absolute pressure), slowly heat and evaporate to concentrate until the concentration of the polya...

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Abstract

The invention discloses a low-melting-point high-flowability ternary random copolymer polyamide modified base material resin and a preparation method thereof. The preparation method comprises the following steps: (1) carrying out a mixed reaction on X mole hexamethylenediamine, X mole adipic acid and water to obtain a polyamide salt solution A, carrying out a mixed reaction on Y mole diamine witha long carbon band branched chain, Y mole adipic acid or hexamethylenediamine and water to obtain a polyamide salt solution B, mixing Z mole caprolactam and desalted water to obtain a caprolactam solution C, and mixing the polyamide salt solution A, the polyamide salt solution B and the caprolactam solution C to obtain a mixed polyamide salt solution; and (2) carrying out evaporation concentration, polymerization and granulation, and adding an antioxidant and a flowability improver to obtain the low-melting-point high-flowability ternary random copolymer polyamide modified base material resin.The molecular chain regularity of the polyamide is reduced, and the melting point is low, so that secondary melting of downstream processing is avoided, and the polyamide is suitable for polyamide modification manufacturers.

Description

technical field [0001] The invention relates to a ternary random copolymerized polyamide modified base material resin and a preparation method thereof. Background technique [0002] Polyhexamethylene adipamide is a material with excellent comprehensive properties and is widely used as engineering plastics. It has the characteristics of good mechanical properties, high hardness, high softening point, and corrosion resistance. However, due to the limitation of its structure, it has the disadvantages of easy decomposition at high temperature, high water absorption, and poor low temperature toughness. In practical applications, polyhexamethylene adipamide often needs to be modified by chemical or physical methods to improve its comprehensive performance to match various needs. [0003] In the downstream modification process, due to the structural characteristics of polyhexamethylene adipamide, the melting point of conventional polyhexamethylene adipamide is about 260-262°C, and...

Claims

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Application Information

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IPC IPC(8): C08G69/36
CPCC08G69/36
Inventor 叶挺王晓华姚增文张日东杨小娜邵继军
Owner HUAFON GROUP
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